CN104811848A - Sound production device - Google Patents
Sound production device Download PDFInfo
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- CN104811848A CN104811848A CN201410816100.1A CN201410816100A CN104811848A CN 104811848 A CN104811848 A CN 104811848A CN 201410816100 A CN201410816100 A CN 201410816100A CN 104811848 A CN104811848 A CN 104811848A
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Abstract
The invention provides a sound production device, which comprises an outer shell, an inner shell and a loudspeaker, and is characterized in that the inner shell is arranged inside the outer shell, and a gap is reserved between the outer surface of the inner shell and the inner surface of the outer shell; the inner shell is provided with a first hole and a second hole which are opposite in position, the loudspeaker is fixed in the first hole, the obverse side of the loudspeaker faces towards the outer shell, and the reverse side of the loudspeaker faces towards the second hole; the outer shell is provided with a third hole which is opposite to the first hole, and a distance is reserved between the third hole and the loudspeaker; and backward sound waves of the loudspeaker penetrate through the second hole, get into the gap and penetrate out from the third hole together with forward sound waves of the loudspeaker. The sound production device provided by the invention can realize that the backward sound waves of the loudspeaker are reversed into the forward sound waves, the acoustic performance of the loudspeaker is improved, and the sound production energy and the efficiency are improved.
Description
Technical field
The present invention relates to technical field of acoustics, particularly relate to a kind of sound-producing device.
Background technology
Traditional sound-producing device, as loud speaker, it is the sound-producing device that a kind of phonation efficiency is very low, the raising of its phonation efficiency can be improved by being arranged in audio amplifier, the theoretical foundation of tradition audio amplifier design is that infinite baffle (Infinite Baffle) is theoretical, namely at diaphragm of loudspeaker forward and place a slice infinite baffle between sound wave dorsad, by just, dorsad sound wave intercept in order to avoid both aloft cancel out each other; But because infinite baffle is difficult to do infinitely great, therefore infinite baffle dorsad to loud speaker is carried out convolution and forms a confined space in sound wave direction, intercept loud speaker sound wave dorsad, discharge the energy of loud speaker forward sound wave completely, thus obtain the structure of modern audio amplifier.
Structural design due to modern audio amplifier is theoretical based on infinite baffle, its theoretical foundation is for suppressing loud speaker sound wave dorsad, and namely fallen by the energy barrier of airtight audio amplifier by loud speaker sound wave dorsad, this just causes the loss of loud speaker sounding energy, therefore, the sounding energy of modern audio amplifier and efficiency very low.
Summary of the invention
The invention provides a kind of sound-producing device, can realize becoming forward sound wave by reverse for the sound wave dorsad of loud speaker, improve the acoustical behavior of loud speaker, improve sounding energy and efficiency.
The invention provides a kind of sound-producing device, comprising: shell body, inner housing, loud speaker, described inner housing is arranged at the inside of described shell body, has gap between the outer surface of described inner housing and the inner surface of described shell body;
Described inner housing offers the first relative hole of position and the second hole, described loud speaker is fixed in described first hole, and described loud speaker just facing to described shell body, the back side of described loud speaker is towards described second hole;
Described shell body offers three hole relative with described first hole, between described 3rd hole and described loud speaker, there is distance; The sound wave dorsad of described loud speaker enters described gap through described second hole, and together passes from described 3rd hole with the forward sound wave of described loud speaker.
Sound-producing device of the present invention, by loud speaker being arranged in the sound-producing device of inside and outside shell structure, the hole that the sound wave dorsad of loud speaker can be offered by inner casing enters the gap between inside and outside shell, and together pass from the hole of shell with the forward sound wave of loud speaker, for the sound wave dorsad of loud speaker provides straightway propagation ducts, overturn the infinite baffle of traditional sound-producing device (such as: audio amplifier) completely, namely the design concept of loud speaker sound wave is dorsad intercepted, achieve the sound wave dorsad effectively utilizing loud speaker, make it the forward sound wave of reverse reinforcement loud speaker, thus improve the acoustical behavior of loud speaker, greatly improve sounding energy and the acoustic efficiency of loud speaker, have great practical value.
Accompanying drawing explanation
The structural representation of the sound-producing device that Fig. 1 provides for the embodiment of the present invention one;
Fig. 2 for the sound-producing device that the embodiment of the present invention two provides be the schematic diagram of cube structure;
Fig. 3 for the sound-producing device that the embodiment of the present invention two provides be the schematic diagram of sphere structure;
Fig. 4 a, Fig. 4 b for sound-producing device that the embodiment of the present invention two provides be the schematic diagram of inner and outer shell shape dissimilar structure;
Point soundboard structure schematic diagram of the sound-producing device that Fig. 5 provides for the embodiment of the present invention two.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.It should be noted that, in accompanying drawing or specification, similar or identical element all uses identical Reference numeral.
Embodiment one
The structural representation of the sound-producing device that Fig. 1 provides for the embodiment of the present invention one.As shown in Figure 1, the invention provides a kind of sound-producing device, comprising: shell body 1, inner housing 2, loud speaker 3, inner housing 2 is arranged at the inside of shell body 1, has gap between the outer surface 21 of inner housing 2 and the inner surface 11 of shell body 1; Inner housing 2 offers the first hole 22 and the second hole 23 that position is relative, loud speaker 3 is fixed in the first hole 22, and the front 31 of loud speaker 3 housing 1 toward the outside, the back side 32 of loud speaker 3 is towards the second hole 23; Shell body 1 offers between the 3rd hole the 12, three hole 12 relative with the first hole 22 and loud speaker 3 and there is distance d; The sound wave dorsad of loud speaker 3 enters gap through the second hole 23, and together passes from the 3rd hole 12 with the forward sound wave of loud speaker 3.
It should be noted that, the sound-producing device in the present invention can be applied to anyly to be had in any sound-producing device of structure described in the invention, and such as, audio amplifier, earphone or musical instrument, following embodiment is all described for audio amplifier.
Concrete, the diaphragm of loudspeaker when there is vibration respectively to forward with send sound wave dorsad, this two-way acoustic wave " phase place " is contrary.So-called " phase place " is arbitrary moment of diaphragm oscillations displacement on the contrary, and the waveform of above-mentioned two-way acoustic wave cancels each other out just, thus causes vibrating diaphragm two-way acoustic wave that " short circuit " phenomenon occurs aloft.The sound of naked loud speaker is often shrivelled, overcautious, narrow, the imbody of Here it is sound " short circuit ".And the birth of audio amplifier, its essence is the efficiency that will play loud speaker, design principle is theoretical based on " infinite baffle ", namely, by diaphragm of loudspeaker forward with sound wave is isolated from one another dorsad, its theoretical model is at diaphragm of loudspeaker forward and places a slice infinite baffle between sound wave dorsad, utilizes forward sound wave, cuts off sound wave dorsad.But infinitely-great baffle there is no practical possibility, so infinite baffle dorsad to loud speaker is carried out convolution and forms a confined space in sound wave direction, theoretical foundation that modern audio amplifier designs that Here it is.
Modern audio amplifier is roughly divided into three classes, airtight box, bass reflex type, transmission line formula; Airtight box by the completely isolated loud speaker sound wave propagation dorsad of confined space; Bass reflex type (being inverted phase type again) audio amplifier be utilize loud speaker dorsad sound wave cabinet wall multipath reflection and form the wave of oscillation, and by the resonance effect of phase-reversing tube to strengthen the bass effect of audio amplifier.But, if loud speaker is full frequency speaker, its dorsad sound wave should also be the sound wave of full range, but this working method of phase inverted cabinet but inhibits sound wave dorsad, and will dorsad sound wave be converted to resonance wave export, it only highlights low-frequency sound wave; Transmission line formula is again labyrinth type audio amplifier, constantly reduces by arranging a bore in audio amplifier and fills the tortuous passageway of sound-absorbing thing, constantly slackens the energy of loud speaker sound wave dorsad, thus obtains good LF-response.Visible no matter any audio amplifier design, is all based on by diaphragm of loudspeaker acoustic energy shielding or suppress the sound wave dorsad of loud speaker dorsad, therefore there is the problem of the electroacoustic power conversion poor efficiency of loud speaker.The diaphragm of loudspeaker sends sound wave energy forward equably backward, and theoretical according to infinite baffle, and forward sound wave is effective energy, and sound wave is invalid harmful energy dorsad, and forward sound wave can utilize, and sound wave then must suppress dorsad.Infer theoretically, the electro-acoustic conversion efficiency of loud speaker can not more than 50%.Say from reality, the electro-acoustic conversion efficiency of rare audio amplifier can reach 30%.The direct performance that electro-acoustic conversion efficiency is low is that frequency response is inferior, and Hz-KHz is narrow.
But, the technology prejudice of abandoning tradition of the present invention, by structural design by loud speaker sound wave reverse formation " forward " sound wave as far as possible from cover to cover dorsad, and unite two into one with loud speaker forward sound wave interaction originally, form very fine full range sound particle, the audio amplifier design of comprehensive beyond tradition in the high-fidelity indexs such as sound-reducing degree, sound field validity and drawing sense.
Sound-producing device concrete structure shown in Fig. 1 is, the double-layer shell structure of shell body 1, inner housing 2, inner housing 2 is arranged at the inside of shell body 1, between inner and outer shell, leave gap, and this gap reverses the propagation ducts after for forward sound wave as making the sound wave dorsad of loud speaker; Inner housing 2 offers the first hole 22 and the second hole 23 that position is relative, wherein, loud speaker 3 is fixed in the first hole 22, and the front 31 of loud speaker 3 housing 1 toward the outside, the forward sound wave of loud speaker 3 is from this front 31 externally radiation; The back side 32 of loud speaker 3, towards the second hole 23, shell body 1 offers between the 3rd hole the 12, three hole 12 relative with the first hole 22 and loud speaker 3 and there is distance d; The sound wave dorsad of loud speaker 3 can pass through from this second hole 23, enters gap, and together passes from the 3rd hole 12 with the forward sound wave of loud speaker 3.Thus make the sound wave dorsad of loud speaker successively by the passage that above-mentioned second hole 23, inner and outer shell gap, the 3rd hole 12 are formed, reverse is swimmingly forward sound wave, strengthens the energy of loud speaker 3 forward sound wave.
The sound-producing device of the present embodiment, by loud speaker being arranged in the sound-producing device of inside and outside shell structure, the hole that the sound wave dorsad of loud speaker can be offered by inner casing enters the gap between inside and outside shell, and together pass from the hole of shell with the forward sound wave of loud speaker, for the sound wave dorsad of loud speaker provides straightway propagation ducts, overturn the infinite baffle of traditional sound-producing device (such as: audio amplifier) completely, namely the design concept of loud speaker sound wave is dorsad intercepted, achieve the sound wave dorsad effectively utilizing loud speaker, make it the forward sound wave of reverse reinforcement loud speaker, thus improve the acoustical behavior of loud speaker, greatly improve sounding energy and the acoustic efficiency of loud speaker, have great practical value.
Embodiment two
Fig. 2 for the sound-producing device that the embodiment of the present invention two provides be the schematic diagram of cube structure.As shown in Figure 2, the invention provides a kind of sound-producing device, on the basis of embodiment one, further, inner housing 2 is identical with shell body 1 shape; Inner housing 2 and shell body 1 are polyhedron, and the center of gravity of inner housing 2 and shell body 1 is overlapping, and as shown in Figure 2, inner and outer shell is cube structure; Or, as shown in Figure 3, Fig. 3 for the sound-producing device that the embodiment of the present invention two provides be the schematic diagram of sphere structure, inner housing 2 and shell body 1 are spheroid, and the centre of sphere of inner housing 2 and shell body 1 is overlapping.
Concrete, if inner and outer shell shape is identical, then by the center of gravity of inner and outer shell is overlapping, the gap uniformity between inside and outside shell can be made, thus make the forward sound wave of the loud speaker reverse rear formation of sound wave dorsad in uniform gap, maintain the even acoustic energy of 360 degree, the volume of sound wave dorsad making to pass from the 3rd hole 12, audio are even, and tonequality is full.On this basis, the shape of inside and outside shell can be varied, cube structure as shown in Figure 2, and inner housing 2 and shell body 1 are square, and the center of gravity of inner housing 2 and shell body 1 is overlapping; Or, sphere structure as shown in Figure 3, inner housing 2 and shell body 1 are spheroid, and the centre of sphere of inner housing 2 and shell body 1 is overlapping; Or, inside and outside shell is cylinder, hexagonal prism, Fang Ti, tri-prismoid etc., as shown in Fig. 4 a, Fig. 4 b, Fig. 4 a, Fig. 4 b for sound-producing device that the embodiment of the present invention two provides be the schematic diagram of inner and outer shell shape dissimilar structure, Fig. 4 a is sound-producing device loud speaker profile dorsad, can see that the inner housing 2 of sound-producing device inside is for cylinder, shell body 1 is tri-prismoid.
This sound-producing device also comprises: partial cone 4, and partial cone 4 is cone structure, and partial cone 4 is fixed on the inner surface 11 of shell body 1, and the cone point 41 of partial cone 4 is relative with the second hole 23.Partial cone 4 can make sound wave dorsad reduce the direct collision with the inner surface 11 of shell body 1, reduce vertical reflection probability, thus the interference reduced original acoustic waveform, sound wave is dorsad made to flow in the guide channel of sound wave dorsad along the cone point 41 of partial cone 4 smoothly, retain original waveform characteristic of sound wave dorsad to greatest extent, make sound wave dorsad to cross closest to the form of original position and forward sound wave.In order to reduce sound wave reflection dorsad further, preventing standing wave from producing, keeping acoustic wave character complete as far as possible simultaneously, the pyramid side 42 partial can being bored 4 is designed to the side 42 of indent.
In addition, this sound-producing device can also comprise (as shown in Figure 5, point soundboard structure schematic diagram of the sound-producing device that Fig. 5 provides for the embodiment of the present invention two): point soundboard 5, the effect of point soundboard 5 and partial are bored 4 identical, are all make sound wave enter the reverse passage of sound wave more smoothly.Divide soundboard 5 to be star-like fin 51 structure, point soundboard 5 is fixed on the inner surface 11 of shell body 1, and the structure centre 52 of point soundboard 5 is relative with the second hole 23, and the fin 51 of point soundboard 5 is towards the second hole 23.In order to reduce sound wave reflection dorsad further, preventing standing wave from producing, keeping acoustic wave character complete simultaneously as far as possible, the fin 51 of point soundboard 5 can be designed to concave inward structure.
Further, the corresponding inside and outside shell gap location of shell body 1 is provided with fourth hole 13, and fourth hole 13 is distributed in the preset range around third through-hole 12, or be provided with at least one block gap demarcation strip 6 (as shown in Fig. 4 a, Fig. 4 b) in the gap between inner and outer shell, being multiple clearance space by separated; The corresponding each clearance space place of shell body 1 is provided with fourth hole 13, and fourth hole 13 is distributed in the preset range around third through-hole 12; The number of fourth hole 13 is less than or equal to the number of clearance space.Sound wave trajectory dorsad better can be controlled by clearance space and/or arranging of fourth hole 13, make the transmission of sound wave dorsad more balanced and sane, thus keep better loud speaker dorsad sound wave primary characteristic and form the effect of high-fidelity and high electro-acoustic conversion efficiency.
Further, the 3rd hole 12 is overlapping with the center of the first hole 22, and the size of the 3rd hole 12 is greater than the size of the first hole 22, front 31 outer circumference of loud speaker 3 is provided with the prerotation vane 7 (as shown in Figure 3) protruded to shell body 1 direction.The size that the size of the 3rd hole 12 is greater than the first hole 22 can make reverse after sound wave dorsad pass from the 3rd hole 12 smoothly, and prerotation vane 7 can avoid the sound wave dorsad passed from the 3rd hole 12 mutually to disturb at hole and forward sound wave, reduce tonequality, by the buffer action of prerotation vane 7, sound wave and forward sound wave are dorsad crossed after the isolation of prerotation vane 7 again, thus realize efficient electroacoustic transition effects, play the diaphragm of loudspeaker vibration ceiling capacity and the originally quality of accurate reproduction source of sound.
Further, this sound-producing device also comprises: tuning layer (not shown); Tuning laminating is located at the position, at least one place (as shown in Figure 2) in following position: the inner surface 11 of the inner surface 24 of inner housing 2, the outer surface 21 of inner housing 2, shell body 1; This tuning layer is the sandwich construction be made up of at least one deck tuning material, and the surface of tuning layer can be provided with groove.The shape of this groove can be designed to different structure in conjunction with audio amplifier acoustic characteristic, and tuning layer not only plays sound absorption, also will play the effect regulating sound wave dorsad, is namely kept the originally characteristic of sound wave dorsad more accurately by the different proportion of sound-absorbing and reflection.
Further, this sound-producing device also comprises: guide pad 8, guide pad 8 is arranged at each edge of each edge of the inner surface 24 of inner housing 2 and/or the inner surface 11 of shell body 1, and the shape of guide pad 8 is mated with each corner of each corner of the inner surface 24 of inner housing 2 and/or the inner surface 11 of shell body 1, and there is inner concave arc surface.Guide pad 8 can reduce reflection and the collision of each corner of sound wave and inner and outer shell inner surface dorsad, this cambered surface along this guide pad 8 that sound wave is level and smooth is dorsad made to flow in the guide channel of sound wave dorsad, thus the original waveform characteristic retained further dorsad, make sound wave dorsad to cross closest to the form of original position and forward sound wave.
The sound-producing device of the present embodiment, by loud speaker being arranged in the sound-producing device of inside and outside shell structure, the hole that the sound wave dorsad of loud speaker can be offered by inner casing enters the gap between inside and outside shell, and together pass from the hole of shell with the forward sound wave of loud speaker, for the sound wave dorsad of loud speaker provides straightway propagation ducts, overturn the infinite baffle of traditional sound-producing device (such as: audio amplifier) completely, namely the design concept of loud speaker sound wave is dorsad intercepted, achieve the sound wave dorsad effectively utilizing loud speaker, keep the original position of sound wave dorsad as far as possible, and cross with the forward sound wave of loud speaker, thus the senior middle school's bass making full frequency speaker balancedly, have no to discharge with constraining, the low frequency being different from traditional audio amplifier depends on Oscillation Amplitude and the reflection of back of the body ripple in audio amplifier of the diaphragm of loudspeaker to a great extent, and the height of the sound-producing device of the present embodiment, in, low frequency be loud speaker self full range sound wave by the reverse passage of sound wave dorsad complete be discharged into aerial, to cross with forward sound wave and to realize loud speaker original high, in, the full backup of low-frequency sound.The sound-producing device of the present embodiment substantially improves the acoustical behavior of loud speaker, improves sounding energy and the acoustic efficiency of loud speaker, has great practical value.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (15)
1. a sound-producing device, is characterized in that, comprising: shell body, inner housing, loud speaker, and described inner housing is arranged at the inside of described shell body, has gap between the outer surface of described inner housing and the inner surface of described shell body;
Described inner housing offers the first relative hole of position and the second hole, described loud speaker is fixed in described first hole, and described loud speaker just facing to described shell body, the back side of described loud speaker is towards described second hole;
Described shell body offers three hole relative with described first hole, between described 3rd hole and described loud speaker, there is distance; The sound wave dorsad of described loud speaker enters described gap through described second hole, and together passes from described 3rd hole with the forward sound wave of described loud speaker.
2. sound-producing device according to claim 1, is characterized in that, described inner housing is identical with described shell body shape.
3. sound-producing device according to claim 2, it is characterized in that, also comprise: guide pad, described guide pad is arranged at each edge of each edge of the inner surface of described inner housing and/or the inner surface of described shell body, and the shape of described guide pad is mated with each corner of each corner of the inner surface of described inner housing and/or the inner surface of described shell body, and there is inner concave arc surface.
4. sound-producing device according to claim 3, is characterized in that, described inner housing and described shell body are polyhedron, and the center of gravity of described inner housing and shell body is overlapping.
5. sound-producing device according to claim 2, is characterized in that, described inner housing and described shell body are spheroid, and the centre of sphere of described inner housing and described shell body is overlapping.
6. the sound-producing device according to any one of Claims 1 to 5, it is characterized in that, also comprise: partial is bored, described partial cone is cone structure, described partial cone is fixed on the inner surface of described shell body, and the cone point of described partial cone is relative with described second hole.
7. sound-producing device according to claim 6, is characterized in that, the pyramid side indent of described partial cone.
8. the sound-producing device according to any one of Claims 1 to 5, it is characterized in that, also comprise: point soundboard, described point of soundboard is star-like fin structure, described point of soundboard is fixed on the inner surface of described shell body, and the structure centre of described point of soundboard is relative with described second hole, the fin of described point of soundboard is towards described second hole.
9. sound-producing device according to claim 8, is characterized in that, the fin indent of described point of soundboard.
10. the sound-producing device according to any one of Claims 1 to 5, is characterized in that, is provided with at least one block gap demarcation strip in described gap, being multiple clearance space by described separated.
11. sound-producing devices according to claim 10, is characterized in that, the corresponding each described clearance space place of described shell body is provided with the 4th hole, and in the preset range of described 4th hole distribution around described 3rd hole; The number of described 4th hole is less than or equal to the number of described clearance space.
12. sound-producing devices according to any one of Claims 1 to 5, it is characterized in that, described 3rd hole is overlapping with the center of described first hole, and the size of described 3rd hole is greater than the size of described first hole, the front outer circumference of described loud speaker is provided with the prerotation vane protruded to described shell body direction.
13. sound-producing devices according to any one of Claims 1 to 5, is characterized in that, also comprise: tuning layer; Described tuning laminating is located at the position, at least one place in following position:
The inner surface of the inner surface of described inner housing, the outer surface of described inner housing, described shell body.
14. sound-producing devices according to claim 13, is characterized in that, described tuning layer is the sandwich construction be made up of at least one deck tuning material, and the surface of described tuning layer is provided with groove.
15. sound-producing devices according to any one of Claims 1 to 5, it is characterized in that, described sound-producing device is audio amplifier, earphone or musical instrument.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410816100.1A CN104811848B (en) | 2014-12-23 | 2014-12-23 | Sound production device |
| PCT/CN2015/085540 WO2016101620A1 (en) | 2014-12-23 | 2015-07-30 | Sound generating device |
| US15/632,256 US20170295424A1 (en) | 2014-12-23 | 2017-06-23 | Sound generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410816100.1A CN104811848B (en) | 2014-12-23 | 2014-12-23 | Sound production device |
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| Publication Number | Publication Date |
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| CN104811848A true CN104811848A (en) | 2015-07-29 |
| CN104811848B CN104811848B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410816100.1A Active CN104811848B (en) | 2014-12-23 | 2014-12-23 | Sound production device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016101620A1 (en) * | 2014-12-23 | 2016-06-30 | 北京太和开元科技有限公司 | Sound generating device |
| CN107249161A (en) * | 2016-11-01 | 2017-10-13 | 佛山市创思特音响有限公司 | Linear array full range sound column |
| CN107295445A (en) * | 2016-03-30 | 2017-10-24 | 北京太和开元科技有限公司 | sound-producing device |
| CN111314829A (en) * | 2019-11-22 | 2020-06-19 | 武汉大学 | MEMS piezoelectric ultrasonic transducer with sound tube |
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| CN103313162A (en) * | 2013-06-26 | 2013-09-18 | 青岛歌尔声学科技有限公司 | Dual-speaker headphone |
| CN103596103A (en) * | 2013-12-06 | 2014-02-19 | 裴维彩 | Double-vibrating-diaphragm loudspeaker box |
| CN204291341U (en) * | 2014-12-23 | 2015-04-22 | 北京太和开元科技有限公司 | Sound-producing device |
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| US20110243359A1 (en) * | 2010-03-31 | 2011-10-06 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Speaker system with subwoofer |
| CN201821476U (en) * | 2010-10-14 | 2011-05-04 | 国光电器股份有限公司 | Spherical sound box |
| CN103313162A (en) * | 2013-06-26 | 2013-09-18 | 青岛歌尔声学科技有限公司 | Dual-speaker headphone |
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| WO2016101620A1 (en) * | 2014-12-23 | 2016-06-30 | 北京太和开元科技有限公司 | Sound generating device |
| CN107295445A (en) * | 2016-03-30 | 2017-10-24 | 北京太和开元科技有限公司 | sound-producing device |
| CN107295445B (en) * | 2016-03-30 | 2023-12-05 | 北京太和开元科技有限公司 | Sounding device |
| CN107249161A (en) * | 2016-11-01 | 2017-10-13 | 佛山市创思特音响有限公司 | Linear array full range sound column |
| CN111314829A (en) * | 2019-11-22 | 2020-06-19 | 武汉大学 | MEMS piezoelectric ultrasonic transducer with sound tube |
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| CN104811848B (en) | 2017-04-12 |
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